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Teach the selector to fold lo(g) into load instruction immediate fields

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24396 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-11-17 18:02:16 +00:00
parent 490ad08097
commit 4f0f86de5f
1 changed files with 8 additions and 0 deletions
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8
lib/Target/PowerPC/PPCISelDAGToDAG.cpp
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@ -413,6 +413,14 @@ bool PPCDAGToDAGISel::SelectAddr(SDOperand Addr, SDOperand &Op1,
Op2 = Select(Addr.getOperand(0));
}
return false;
} else if (Addr.getOperand(1).getOpcode() == PPCISD::Lo) {
// Match LOAD (ADD (X, Lo(G))).
assert(!cast<ConstantSDNode>(Addr.getOperand(1).getOperand(1))->getValue()
&& "Cannot handle constant offsets yet!");
Op1 = Addr.getOperand(1).getOperand(0); // The global address.
assert(Op1.getOpcode() == ISD::TargetGlobalAddress);
Op2 = Select(Addr.getOperand(0));
return false; // [&g+r]
} else {
Op1 = Select(Addr.getOperand(0));
Op2 = Select(Addr.getOperand(1));